511241023655 has 4 divisors (see below), whose sum is σ = 613489228392. Its totient is φ = 408992818920.

The previous prime is 511241023651. The next prime is 511241023669. The reversal of 511241023655 is 556320142115.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 511241023655 - 2² = 511241023651 is a prime.

It is a super-2 number, since 2×511241023655² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511241023651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51124102361 + ... + 51124102370.

It is an arithmetic number, because the mean of its divisors is an integer number (153372307098).

Almost surely, 2^511241023655 is an apocalyptic number.

511241023655 is a deficient number, since it is larger than the sum of its proper divisors (102248204737).

511241023655 is a wasteful number, since it uses less digits than its factorization.

511241023655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102248204736.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 511241023655 in words is "five hundred eleven billion, two hundred forty-one million, twenty-three thousand, six hundred fifty-five".